You unlock PRINCESS DAISY!!
To unlock the quaker you have to win 150cc star cup
150cc Lightning cup.
you get first in the 150cc leaf cup
To unlock Mirror Mode, you have to place 1st on every cup in 150cc.
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To unlock Honey Queen, get a gold trophy in 150cc Banana cup. To unlock Wigger, get a gold trophy in 150cc Leaf Cup.
You have to win the Flower Cup on 50cc, 100cc, or 150cc. (If you beat Flower Cup on 50cc, it will not appear on 100cc or 150cc, etc.)
just win 150cc
150cc flower cup
you get gold on every thing 50cc-150cc.when you get gold on the lightning cup on 150cc you unlock mirror.
Beat the Shell Cup on 150cc
win 150cc special cup